Balanced oscillating valve



(No Model.)

W. T. RBASER.

BALANGBD OSGILLATING VALVE.

. No. 394,505. Patented Deo. 11, 1888.

` llllllllllll/llllllllIll/llllll/Willi/[1% M I A UNITED STATES PATENT OFFICE.

TARREN T. REASER, OF FAIRMONT, NEBRASKA, ASSIGNOR TO THE ROIIND VALVE COMPANY, OF CHICAGO, ILLINOIS.

BALANCED OSCILLATING VALVE.

SPECIFICATION forming part of Letters Patent No. 394,505, dated December 11, 1888.

Application tiled December 22, 1887. Serial No. 258,734. No model.)

To all whom it may concern: crossing the steam-ports in the valve. e is a Be it known that I, XVARREN T. REASER, a crank-arm attached to the valve-rod d, for the 'citizen of the United States, residing at Fairpurpose of attaching the eccentric-rod ot' the mont, in the county ot' Fillmore and State of engine,which gives motion to the valve. This 5 Nebraska, have invented certain new and usearm may be attached to one side ofthe steam- 5 5 ful Improvements in Balanced Oscillating chest, as shown in enlarged valve, Fig. 3, or i Valves for Steam-Engines; and I do declare to both sides, as shown in Fig. 2, so that conthe following' to be a full, clear, and exact denections may be made at both ends and equalscription of the invention, such as will enaize the strain.

1o ble others skilled in the art to which it apperf f f f f are spiral springs for pressing the 6o trains to make and use the saine, reference bepacking-rings against the casing I), and are ing had to the accompanyingdrawings, and to placed in recesses in the flange. the letters and figures of reference marked h is the exhaust-port connecting with the thereon, which forni a part ot' this specicaeduction-pipej.

I5 tion. In constructing an engine to be operated 65 This invention relates to balanced oscillatwith this valve I prefer to cast the side walls ing valves for steam-engines, the object beof the steam-chest B integral with the cylining to so construct the valve patented to me der, the cover being removable and secured May 2l, 1887, as to render its application to the side walls ot' the chest by bolts in the 2o more practical and economical. In this imordinary manner. \Vithin this chest and 7o proved valve I place the steam-ports suttiiirnily bolted to the cylinder is the cap D, ciently above the center ot' oscillation to seinicircular in cross section and ot" such counteract the upward pressure of the exlength and diameter as to inclose the upper haust-cavity, and also extend the valve-rod halt' of the valve C. The lower half of the 25 through both sides ot" the outer steam chest valve occupies a seinicircular recess formed 75 or casing, thus obviating any twisting or torin the cylinder. Said valve also has a cavity, sional strains on the valve,which,with its casb, in its lower side, which cavity receives the ing, is entirely submerged in live steam, the exhaust-steam coming from each end ot` the whole being inclosed in the outer steam-chest, cylinder through the passages d d, and opens 3o thus preventing unequal expansion and coninto the exhaust-passage through the port h. 8o sequent wear. It will thus be seen that one 'half of the valve In the drawings, Figurel isa sectional ele- C is within the recess of the cylinder, the vation of an engine provided with my imother halt' being covered by the cap D. This proved valve. Fig. 2 is a cross-section through cap, as well as the valve, is open at both ends,

35 the center ot' valve on linea; .L' of Fig. '.l. Fig. thus giving t'ree entrance Yfor steam from the 85 3 is an enlarged sectional elevation of the steam-chest to theinteriorot' the valve,whence valve on the line @j y of Fig. 2. Fig. 4 an it passes through the ports cand dalternately` enlarged cross-section of the valve. to opposite ends of the cylinder as the valve Like letters indicate like parts in the sevis oscillated, and, after its work in said cylin- 4o eral views. der is done, escapes through the port b into 9o A is the cylinder oi' an engine. the exhaust-passage. The valve-seat, form- B is the outer steam-chest. ing an integral part ot' the cylinder in the C is the balanced valve. steam-chest, extends upward into said chest, D is the valve-case. so that the steam passes down at each end ot' 45 a is the valve-rod. I; is the exhaust-cavity the valve to within a short distance ol' the 95 in the valve. bore of the cylinder, thus keeping the valvec c are steam-ports cut through the valve seat and the case D at the saine temperature, sufficiently above its center t0 provide for its as well as allowing a free entrance at both being always held down on the cylinder ends of the valve. To prevent leakage of 5o steam-ports CZ d. k k are strengthening-bars steam through between the ends of the valve loo and the valve-seat, each end of the valve is' provided with a radially-proj ecting flange, in which is formed a circular groove containing suitable packing-rings that are retained in contact with the ends of the case and the sides of the valve-case by the coil-springs f, placed in recesses of the groove behind the packing-rings. As in a valve with long steamports there would be a liability to springin the opposite walls of said ports, the strengthening bars or bridges 7c are cast integral with the valve, and are placed along the ports at such distances from cach other as to give the needed stiffness to the valve. The rodv or axle ce passes through the center of the valve, and has its bearings in the sides of the steamchest, its ends proj eoting therefrom and one or both `provided with crank-arms, to which the rod from the eccentric of the engine is attached to give motion to the valve.

The operation of these devices will be readily understood froin the above description in connection with the drawings.

Steam enters the chest through the inlet p, having free access to the interior of the valve through its ends, and thence passes through the ports as the valve is oscillated alternately to the opposite ends of the cylinder.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent, the following:

l. In balanced oscillating valves for steamengines, the cap D, inclosing the upper half of the valve C, in combination with said valve, the cylinder inclosing the lower half, and the whole being surrounded by the steam-chest B, its sides made integral with the cylinder, all the parts being arranged, as shown and described, to admit livesteam to both ends of the valve, as specified.

2. In a balanced oscillating valve for steamengines, the combination of the valve C, having ports c c above the center of oscillation, the cap D, inclosing the upper half and the cylinder A the lower half of said valve, the packing-rings, and springs in a recess at each end of the same, the steam-chest B, its sides made integral with the cylinder, the valve rod or shaft a, and the crank-arms e, attached to each end thereof, in the manner shown and described, and for the purpose set forth.

3. In a balanced oscillating valve for steamengines, the valve C, open at both ends and provided with radially-projecting flanges and packing-rings therein, also with ports c c, eX- tending nearly the whole length of the valve, and bars 7c lc, bridging said ports, in the manner speciied, and for the purpose set forth.

In testimony whereof I affix my sign ature in presence of two witnesses.

VARREN T. REASER.

IV itn esses:

S. L. BURsoN, J. B. BIDWELL. 

